Abstract: A double knife, that can be unitary or consisting of two separate knives, is configured to be mounted on a reciprocating bar of a reciprocating knife. The double knife comprises two cutting sections extending in a forward direction which is perpendicular to the direction of reciprocation. Each of the cutting sections has two lateral faces with serrated cutting edges. The serrations of one cutting section are offset in the forward direction from the serrations of the other cutting section. The two cutting sections can be provided on a single double knife or on separate knives. Preferably, the stroke of the knives is larger than their width, such that a guard finger interacts with two cutting sections and the wear of the guard finger is reduced, since each of the cutting sections interacts with different locations of the guard finger.

Abstract: A rotor, in an agricultural harvester crop processing unit, comprising a drum to which crop processing elements for an infeed section and a threshing section are affixed. The drum comprises a rearward cylindrical portion and a forwardly extending frusto-conical portion. The frusto-conical portion is divided into an aft-region adjacent to the rearward cylindrical portion of the drum, and a fore-region. The infeed section has at least one infeed element located on the fore-region of the frusto-conical portion of the drum. The crop processing section has at least one crop processing element located on the aft-region of the frusto-conical portion of the drum.

Abstract: A double knife, that can be unitary or consisting of two separate knives, is configured to be mounted on a reciprocating bar of a reciprocating knife. The double knife comprises two cutting sections extending in a forward direction which is perpendicular to the direction of reciprocation. Each of the cutting sections has two lateral faces with serrated cutting edges. The serrations of one cutting section are offset in the forward direction from the serrations of the other cutting section. The two cutting sections can be provided on a single double knife or on separate knives. Preferably, the stroke of the knives is larger than their width, such that a guard finger interacts with two cutting sections and the wear of the guard finger is reduced, since each of the cutting sections interacts with different locations of the guard finger.

Abstract: A system and method for limiting crop loss when harvesting on sloped or rolling ground by adjusting the chaffer and/or sieve, or longitudinal sections thereof, so as to overcompensate for the ground slope so that the chaffer and/or sieve sections are actually inclined away from horizontal opposite the direction of ground slope at a selected angle. Such overcompensation increases crop harvesting efficiencies over systems that simply work to level the chaffer and/or sieve sections, without the high expenses associated with a combine having a pivoting axle.

Abstract: A rotor, in an agricultural harvester crop processing unit, comprising a drum to which crop processing elements for an infeed section and a threshing section are affixed. The drum comprises a rearward cylindrical portion and a forwardly extending frusto-conical portion. The frusto-conical portion is divided into an aft-region adjacent to the rearward cylindrical portion of the drum, and a fore-region. The infeed section has at least one infeed element located on the fore-region of the frusto-conical portion of the drum. The crop processing section has at least one crop processing element located on the aft-region of the frusto-conical portion of the drum.